两流体双压力热工水力系统分析软件LOCUST 2.0架构设计

Architecture Design of Two-Fluid Two-Pressure Thermal-Hydraulic System Analysis Code LOCUST 2.0

中国广核集团(CGN)研发了一款新的热工水力系统分析软件LOCUST 2.0,它采用两流体两场双压力七方程模型,从理论上保证了守恒方程的严格适定性。LOCUST 2.0的应用对象为华龙一号失水事故类的安全分析,目前已初步完成代码开发。本文简要描述了该软件的守恒方程、数值算法、软件功能、源代码架构设计;给出了6个典型案例的分析计算,结果表明该软件能够合理预测热工水力进程,性能良好。

China General Nuclear Power Corporation(CGN)is developing a new thermal hydraulic system analysis code LOCUST 2.0,which uses two-fluid two-field two-pressure sevenequation models,theoretically ensuring the strict well-posedness of conservation equations.The design application of LOCUST 2.0 is the safety analysis of loss-of-coolant accidents(LOCAs)for HPR1000,and its source codes have been preliminarily completed at present.In this paper,the conservation equations,numerical methods,software functions,and code architecture design are briefed introduced.Meanwhile,the calculation results of six typical test cases are given,and the results show that the code reasonably predicts the thermal-hydraulic processes and has good performance.